Nothing Phone (4a) Pro vs OnePlus 15T

Nothing Phone (4a) Pro

A 6.83-inch 1.5K AMOLED at 144Hz with 2,160Hz PWM dimming — reviewers agree it's the best screen Nothing has built, with realistic outdoor brightness around 1,600 nits. The headline 5,000-nit peak, though, only materialises with special HDR test files; everyday brightness is far lower.

• Nothing's best-ever display: a 144Hz panel with 1,600 nits of outdoor brightness and a claimed 5,000 nits peak; the main camera is solid too with nice detail and well-reproduced colours.
• A claimed 1,600-nit outdoor brightness is realistic — no major visibility issues outdoors even in strong sunshine, putting it among the best affordable phones, and Nothing OS has some of the best design consistency of any Android UI.
• The 4,500-nit HDR peak was only validated with specific HDR test files, not actual video playback — real-world output is around 700 nits in SDR and 1,550–1,600 in HDR.
• The '5,000-nit peak brightness' spec means nothing in practice — a marketing figure pulled from a single-pixel measurement.
• 144Hz refresh (vs 120Hz on the regular 4a) and 1,600 nits white brightness / 5,000 nits peak, marketed as 66% brighter than the Phone (3a) series — though there's no extra output on a small 10% window.
• High-frequency PWM dimming makes it better suited to users sensitive to screen flicker, although slight flickering is still present.

OnePlus 15T

The 6.32-inch 165 Hz 1.5K AMOLED panel is the only true 165 Hz compact-flagship display on the market and pairs that refresh rate with a measured 1,800 nits brightness, 460 ppi pixel density, Crystal Shield Glass, and HDR10+/Dolby Vision support. Native 165 Hz support in popular FPS games is a real differentiator. Notebookcheck flags 120.7 Hz PWM dimming that can cause eyestrain for sensitive users.

• The 6.32-inch 165 Hz AMOLED panel achieves a very good 460 ppi pixel density and the advertised maximum brightness of 1,800 nits in standard measurement.
• Display sharpness is plenty competent — sharp, smooth, and easily one of the strongest spec sheets you can get on a compact phone.
• Native 165 Hz support in COD, Delta Force and Peacekeeper Elite makes this the only small-screen flagship pushing a full 165 Hz gaming experience.
• OnePlus claims up to 3,600 nits peak brightness — even on a playground in direct sunlight you can still see everything clearly, no squinting required.
• Specifications confirm a 6.32-inch 1.5K (1216 × 2640) resolution with 165 Hz refresh — a configuration unique to the 15T in the compact class.

Nothing Phone (4a) Pro

The Snapdragon 7 Gen 4 with UFS 3.1 storage is a clear, tangible step up from the Phone (3a) generation — Nothing claims +27% CPU, +30% GPU and +65% AI. It's a perfectly capable everyday chip that feels noticeably quicker, but it's explicitly not a gaming powerhouse and warms up under sustained heavy load.

• Backed by OS optimisations and a custom CPU scheduler, the chipset delivers 27% better CPU, 30% better GPU and 65% better AI performance than the Nothing Phone (3a); storage is 147% faster in reads and 380% faster in writes.
• Snapdragon 7 Gen 4 is a perfectly acceptable chip across the board, and the upgrade to UFS 3.1 makes this feel noticeably quicker compared to the Nothing Phone (3a) and prior.
• The CPU performance difference between the 4a Pro and the vanilla 4a is not massive, but it is still very much notable.
• Available in 8GB+128GB, 8GB+256GB and 12GB+256GB configurations, all running near-stock AOSP-style Nothing OS.
• Like most phones in this segment, it shows some basic heat build-up during really extensive tasks like gaming or 4K editing in high-end software, though it stays responsive while gaming.
• It's by no means a top-notch gaming phone, although the processor is better than the regular 4a's and squeezes out a bit more performance and FPS.

OnePlus 15T

Snapdragon 8 Elite Gen 5 paired with 12-16GB LPDDR5X Ultra Pro RAM delivers flagship synthetic scores — Notebookcheck recorded Geekbench multi-core 10,976 and 3DMark Wild Life Unlimited 29,901, on par with the larger Xiaomi 17 and Honor Magic8 Pro Air. The problem is sustained: in the 3DMark Wild Life stress test the GPU drops over 50% and the back of the phone hits 50 °C, which both Notebookcheck and SuperSaf flag as a deal-breaker for long gaming sessions.

• Geekbench 6 multi-core hits 10,976 — flagship-tier and within 1% of the average 8 Elite Gen 5 result, so there is no compromise on the chipset versus larger phones.
• 3DMark Wild Life Unlimited hits 29,901 — 5% above the 8 Elite Gen 5 average and ahead of the Xiaomi 17 with the same chip.
• In the 3DMark stress tests the OnePlus 15T shows a sharp drop in performance of over 50%, which significantly lowers our rating.
• Wildlife Extreme stress test scores swung from 6,990 best loop to 3,743 worst loop in a single run — the chart is 'quite a bit of a bumpy ride' and performance mode did nothing to stabilize it.
• Surface temperatures hit 48.3 °C on the back during stress testing and continued climbing to 50 °C near the camera bump — about 45 °C internal — which seems to be the phone's thermal limit.

Nothing Phone (4a) Pro

The ~5,080mAh cell reliably gets through a day and endurance improved across all of GSMArena's tests versus the 3a Pro — but it's only an 80mAh bump over last year and looks small next to 6,000–7,000mAh budget rivals. 50W wired charging is the trade-off win; there is no wireless charging at all.

• Endurance has improved across the board in all tests compared to last year's Nothing Phone (3a) Pro; with a 68W USB-PD charger the phone peaked at around 42W.
• The review unit gets through a day without problems, but it'll certainly be into the red and close to done after about 15 hours of use; the OnePlus 15R has a much meatier battery to last longer.
• It's only an 80mAh increase over last year — small fry next to budget rivals like the Poco M8 Pro, which uses silicon-carbon tech to reach 6,500mAh.
• 50W wired charging is very respectable at this price — besting anything Google, Apple or Samsung offers below £500.
• Because the processor isn't power-hungry and the battery is large for the chip, real-world battery life is excellent.
• Roughly 13 hours of continuous playback at maximum brightness in a streaming test — impressive for what Nothing is doing at this price.

OnePlus 15T

This is the section the OnePlus 15T was built to win. The 7,500 mAh silicon-carbon 'Glacier' cell is the largest ever fitted to a true compact phone — 50% bigger than the iPhone 17's pack in a similar footprint. Notebookcheck measured roughly 1.5 days of real-world endurance at 150 cd/m². Wired charging tops out at 100 W, wireless at 50 W. The only friction points are the missing built-in magnets for MagSafe-style alignment and the still-USB-2.0 port.

• OnePlus relies on a silicon-carbon-based battery with a large capacity of 7,500 mAh for its mini flagship — in our practical battery test at 150 cd/m² brightness, the 15T achieved an excellent battery life of nearly 1.5 days.
• 9to5Google's preview confirms the 7,500 mAh cell carries the same 'Glacier' moniker as the OnePlus 15's battery, so the silicon-carbon structure is here too — 200 mAh more than the larger sibling.
• Even though the phone keeps the same compact size, it now packs a massive 7,500 mAh battery — to put that into perspective, the iPhone 17 Pro Max only has around 5,000 mAh, and this is a 6.32-inch phone.
• Battery life is wild for a phone this size and is actually a hair bigger than the one in the OnePlus 15, which has a noticeably larger footprint.

Nothing Phone (4a) Pro

Nothing OS 4.1 on Android 16 is the universal favourite: near-stock AOSP functionality with a distinctive monochrome visual identity, almost no bloatware, and AI that's present but not forced. The one hard reservation is update length — only 3 years of OS upgrades against 6 years of security patches.

• Nothing OS sticks close to a clean, near-stock Android (AOSP) experience in functionality, but stands out with its distinctive visual identity.
• After a week the phone is 'absolutely brilliant'; software is where Nothing phones shine, even if the camera 'window' at the top of the display is basically a pseudo-iPhone look.
• Software is where Nothing phones absolutely shine — the clearest reason to pick this over rivals.
• There's a smattering of AI here, but it's not shoved down your throat — and the software is basically the same clean setup as the regular Nothing Phone (4a).
• Unlike Samsung's Galaxy AI which is in your face from day one, Nothing's AI stays out of the way — an impressive, restrained package overall.
• Nothing's take on Android 16 has some of the best design consistency you'll find on any Android UI, Google included.

OnePlus 15T

The OnePlus 15T ships with ColorOS 16 on Android 16 in China rather than the global OxygenOS, though the two skins are now nearly identical in feel. Update commitments are unclear — OnePlus doesn't publish a timeline for Chinese-market hardware, and even the global OnePlus 15 only commits to 4 years of major Android upgrades. Mind Space (AI-powered productivity vault) and Gemini integration are the headline software features.

• ColorOS 16 comes pre-installed on the 15T instead of OxygenOS — but the differences are minor overall, with German language and Android Auto supported, though no WearOS watches or eSIMs.
• There are question marks over the duration of the updates provided — the manufacturer does not usually provide any information on this for China, though typically a OnePlus 15-class phone should receive security updates for six years.
• OxygenOS 16 (and ColorOS 16 by extension) integrates Gemini with Mind Space — you can ask Gemini about any saved memory and it accesses local content to perform tasks, making it the best on-phone AI integration we have seen.
• Mind Space is the headline AI feature — a digital vault that takes a screenshot of important content and saves it as a card with URL, summary, title and hashtags for contextual search.